GM Service Manual Online
For 1990-2009 cars only

Diagnostic Instructions

    •  Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    •  Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    •  Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC B101E 42: ECU Software Performance Calibration Data Set Not Programmed

Circuit/System Description

When the ignition is turned ON, the radio performs a self test to verify if any critical malfunction exists within the system. Once the power-up is completed, the radio establishes communications with the body control module (BCM). During the power-up mode the radio checks for a valid calibration data set. If no valid calibration set is found the radio disables the system.

Conditions for Running the DTC

    • Ignition is in ON or ACCY
    • The system voltage is at least 9.5 volts and no more than 15.5 volts.
    • All the above conditions are present for greater than 10 seconds.

Conditions for Setting the DTC

The calibration data set is not programmed in the radio.

Action Taken When the DTC Sets

Radio functions are disabled

Conditions for Clearing the DTC

    • A current DTC clears when the conditions for setting the DTC are no longer present.
    • A history DTC clears after 50 malfunction-free ignition cycles.

Reference Information

Schematic Reference

Radio/Navigation System Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Radio/Audio System Description and Operation

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing

Verify that DTC B101E is not set.

If the DTC is set, perform the Radio Programming and Setup procedure. If the DTC resets, replace the radio.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for radio replacement, setup, and programming